miles an hour. The waves ran along at about eight feet from one
another, tracing two furrows of light. As night fell a bright
reflection rose even to the "Albatross," so that she might have been
taken for a flaming aerolite. Never before had Robur sailed on a sea
of fire--fire without heat--which there was no need to flee from as
it mounted upwards into the sky.

The cause of this light must have been electricity; it could not be
attributed to a bank of fish spawn, nor to a crowd of those
animalculae that give phosphorescence to the sea, and this showed
that the electrical tension of the atmosphere was considerable.

In the morning an ordinary ship would probably have been lost. But
the "Albatross" played with the winds and waves like the powerful
bird whose name she bore. If she did not walk on their surface like
the petrels, she could like the eagles find calm and sunshine in the
higher zones.

They had now passed the forty-seventh parallel. The day was but
little over seven hours long, and would become even less as they
approached the Pole.

About one o'clock in the afternoon the "Albatross" was floating along
in a lower current than usual, about a hundred feet from the level of
the sea. The air was calm, but in certain parts of the sky were thick
black clouds, massed in mountains, on their upper surface, and ruled
off below by a sharp horizontal line. From these clouds a few lengthy
protuberances escaped, and their points as they fell seemed to draw
up hills of foaming water to meet them.